linux-kernel - [PATCH 0/5] I3C slave mode support

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Message-Id: <20231018215809.3477437-1-Frank.Li@nxp.com>
Date:   Wed, 18 Oct 2023 17:58:04 -0400
From:   Frank Li <Frank.Li@....com>
To:     miquel.raynal@...tlin.com, conor.culhane@...vaco.com,
        alexandre.belloni@...tlin.com, robh+dt@...nel.org,
        krzysztof.kozlowski+dt@...aro.org, conor+dt@...nel.org,
        corbet@....net, joe@...ches.com, Frank.Li@....com,
        linux-i3c@...ts.infradead.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-doc@...r.kernel.org
Cc:     gregkh@...uxfoundation.org, imx@...ts.linux.dev,
        jirislaby@...nel.org, linux-serial@...r.kernel.org
Subject: [PATCH 0/5] I3C slave mode support

This  patch introduces support for I3C slave mode, which is referenced
with a PCIe Endpoint system. It also establishes a configuration framework
(configfs) for the I3C slave controller driver and the I3C slave function
driver

Typic usage as

The user can configure the i3c-slave-tty device using configfs entry. In
order to change the vendorid, the following commands can be used

        # echo 0x011b > functions/tty/func1/vendor_id
        # echo 0x1000 > functions/tty/func1/part_id
        # echo 0x6 > functions/tty/t/bcr

Binding i3c-slave-tty Device to slave Controller
------------------------------------------------

In order for the slave function device to be useful, it has to be bound to
a I3C slave controller driver. Use the configfs to bind the function
device to one of the controller driver present in the system::

        # ln -s functions/pci_epf_test/func1 controllers/44330000.i3c-slave/

Host side:
        cat /dev/ttyI3C0
Slave side:
        echo abc >/dev/ttyI3C0

Master side patch:
https://lore.kernel.org/imx/20231018211111.3437929-1-Frank.Li@nxp.com/T/#u

Frank Li (5):
  i3c: add slave mode support
  dt-bindings: i3c: svc: add compatible string i3c: silvaco,i3c-slave
  i3c: slave: add svc slave controller support
  i3c: slave: func: add tty driver
  Documentation: i3c: Add I3C slave mode controller and function

 .../bindings/i3c/silvaco,i3c-master.yaml      |   8 +-
 Documentation/driver-api/i3c/index.rst        |   1 +
 .../driver-api/i3c/slave/i3c-slave-cfs.rst    | 109 +++
 .../driver-api/i3c/slave/i3c-slave.rst        | 189 +++++
 .../driver-api/i3c/slave/i3c-tty-function.rst | 103 +++
 .../driver-api/i3c/slave/i3c-tty-howto.rst    | 109 +++
 Documentation/driver-api/i3c/slave/index.rst  |  13 +
 drivers/i3c/Kconfig                           |  30 +
 drivers/i3c/Makefile                          |   4 +
 drivers/i3c/func/Kconfig                      |   9 +
 drivers/i3c/func/Makefile                     |   3 +
 drivers/i3c/func/tty.c                        | 548 ++++++++++++
 drivers/i3c/i3c-cfs.c                         | 389 +++++++++
 drivers/i3c/slave.c                           | 453 ++++++++++
 drivers/i3c/slave/Kconfig                     |   9 +
 drivers/i3c/slave/Makefile                    |   4 +
 drivers/i3c/slave/svc-i3c-slave.c             | 795 ++++++++++++++++++
 include/linux/i3c/slave.h                     | 503 +++++++++++
 18 files changed, 3276 insertions(+), 3 deletions(-)
 create mode 100644 Documentation/driver-api/i3c/slave/i3c-slave-cfs.rst
 create mode 100644 Documentation/driver-api/i3c/slave/i3c-slave.rst
 create mode 100644 Documentation/driver-api/i3c/slave/i3c-tty-function.rst
 create mode 100644 Documentation/driver-api/i3c/slave/i3c-tty-howto.rst
 create mode 100644 Documentation/driver-api/i3c/slave/index.rst
 create mode 100644 drivers/i3c/func/Kconfig
 create mode 100644 drivers/i3c/func/Makefile
 create mode 100644 drivers/i3c/func/tty.c
 create mode 100644 drivers/i3c/i3c-cfs.c
 create mode 100644 drivers/i3c/slave.c
 create mode 100644 drivers/i3c/slave/Kconfig
 create mode 100644 drivers/i3c/slave/Makefile
 create mode 100644 drivers/i3c/slave/svc-i3c-slave.c
 create mode 100644 include/linux/i3c/slave.h

-- 
2.34.1